#define   _CRT_SECURE_NO_WARNINGS 1
void* my_memcpy(void* dest,const void* src, size_t num)
{
	assert(dest && src);
	void* ret = dest;
	while (num--)
	{
		*(char*)dest = *(char*)src;
		dest = (char*)dest + 1;
		src = (char*)src + 1;
	}
	return (ret);

}